The tor that is referred to is identified as Streptopelia turtur, while the yonah is identified as Columba livia domestica. These birds are consistently referred to differently, the former are called torim, while the latter are called bene yonah. This is understood by the Sages to mean that a tor is only qualified to be brought as a sacrifice when it is an adult bird, while the yonah can only be brought when it is young, before it reaches adulthood. According to the Mishnah in MassekhetHullin (1:5), these two periods are mutually exclusive, and what would be an appropriate sacrifice in a pigeon would be inappropriate in a dove, and vice versa. The cut-off point between the two is just four or five days after hatching, when the bird’s body becomes covered with plumage – gold in the case of torim and yellow in the case of bene yonah.
As we have learned (see above, daf, or page 10), korbanot that cannot be brought on the altar may lose their status as kodashei ha-Shem – sacrifices that are holy to God – for which the laws of me’ilah will not apply.
On yesterday’s daf, the Mishnah taught that an example of this are the two types of fowl that are brought as sacrifices – torim and benei yonah – turtledoves and pigeons (see Sefer Vayikra1:14). According to the Mishnah:
Turtledoves that have not reached the right age and pigeons which have exceeded the right age may not be enjoyed; they are, however, not subject to the law of sacrilege.
The Mishnah on today’s daf presents the opinion of Rabbi Shimon, who teaches that there is a difference between torimand benei yonah.
Rabbi Shimon taught:
Turtledoves which have not yet reached the right age are subject to the law of sacrilege, while it is forbidden to benefit from pigeons that have exceeded the right age, but they are exempted from the law of sacrilege.
Rabbi Shimon believes that since an underage tor can be offered when its gets older, the laws of me’ilah apply to it.